Working principle of back pressure valve made of domestic stainless steel

Working principle of back pressure valve made of domestic stainless steelWorking principle of back pressure valve made of domestic stainless steel

The working principle of a back pressure valve is mainly based on the interaction between the elastic force of the spring and the fluid pressure. The following is a detailed explanation of the working principle of the back pressure valve:

1. System pressure and spring elasticity：

• When the system pressure is lower than the set value, the elastic force of the spring will push the diaphragm to block the pipeline, preventing the fluid from continuing to flow, thereby maintaining the pressure inside the pipeline not lower than the set value.

• When the system pressure is higher than the set value, the fluid pressure will compress the spring, causing the diaphragm to move and the pipeline to connect, allowing the fluid to pass through the back pressure valve, thereby releasing some pressure and keeping the system pressure within the set range1.

2. Prevent siphon phenomenon：

• During the pump discharge stroke, the liquid opens the diaphragm and passes through the back pressure valve; During the suction stroke of the pump, the back pressure valve prevents siphon phenomenon and ensures the normal operation of the pump.

3. use in combination：

• Back pressure valves are usually used in conjunction with other pipeline components such as pulsation dampers to absorb flow peaks, reduce the wear rate of back pressure valves, and protect pipelines from pressure fluctuations2.

4. stress regulation：

• The rated pressure of the back pressure valve can be adjusted. Generally, the length of the spring is changed by adjusting the top rod of the spring to achieve pressure setting and adjustment3.

5. protection system：

• The back pressure valve controls the pressure and flow rate of the fluid to protect the system from overload or damage, ensuring the safe and stable operation of the system4.

6. Application scenarios：

• Back pressure valves are commonly used in metering pump outlets, preventing siphon phenomena, and eliminating changes in dosing caused by pressure fluctuations at the dosing point2.

Through the above working principle, the back pressure valve can maintain stable pressure in the system, protect the pump and pipeline from pressure fluctuations, and ensure the normal operation of the system5